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-rw-r--r--libcli/nbt/lmhosts.c243
1 files changed, 243 insertions, 0 deletions
diff --git a/libcli/nbt/lmhosts.c b/libcli/nbt/lmhosts.c
new file mode 100644
index 0000000..dd06e70
--- /dev/null
+++ b/libcli/nbt/lmhosts.c
@@ -0,0 +1,243 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ manipulate nbt name structures
+
+ Copyright (C) Andrew Tridgell 1994-1998
+ Copyright (C) Jeremy Allison 2007
+ Copyright (C) Andrew Bartlett 2009.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "lib/util/util_net.h"
+#include "system/filesys.h"
+#include "system/network.h"
+#include "../libcli/nbt/libnbt.h"
+
+/********************************************************
+ Start parsing the lmhosts file.
+*********************************************************/
+
+FILE *startlmhosts(const char *fname)
+{
+ FILE *fp = fopen(fname, "r");
+ if (!fp) {
+ DEBUG(4,("startlmhosts: Can't open lmhosts file %s. "
+ "Error was %s\n",
+ fname, strerror(errno)));
+ return NULL;
+ }
+ return fp;
+}
+
+/********************************************************
+ Parse the next line in the lmhosts file.
+*********************************************************/
+
+bool getlmhostsent(TALLOC_CTX *ctx, FILE *fp, char **pp_name, int *name_type,
+ struct sockaddr_storage *pss)
+{
+ char line[1024];
+
+ *pp_name = NULL;
+
+ while(!feof(fp) && !ferror(fp)) {
+ char *ip = NULL;
+ char *flags = NULL;
+ char *extra = NULL;
+ char *name = NULL;
+ const char *ptr;
+ char *ptr1 = NULL;
+ int count = 0;
+
+ *name_type = -1;
+
+ if (!fgets_slash(NULL,line,sizeof(line),fp)) {
+ continue;
+ }
+
+ if (*line == '#') {
+ continue;
+ }
+
+ ptr = line;
+
+ if (next_token_talloc(ctx, &ptr, &ip, NULL))
+ ++count;
+ if (next_token_talloc(ctx, &ptr, &name, NULL))
+ ++count;
+ if (next_token_talloc(ctx, &ptr, &flags, NULL))
+ ++count;
+ if (next_token_talloc(ctx, &ptr, &extra, NULL))
+ ++count;
+
+ if (count <= 0)
+ continue;
+
+ if (count > 0 && count < 2) {
+ DEBUG(0,("getlmhostsent: Ill formed hosts line [%s]\n",
+ line));
+ continue;
+ }
+
+ if (count >= 4) {
+ DEBUG(0,("getlmhostsent: too many columns "
+ "in lmhosts file (obsolete syntax)\n"));
+ continue;
+ }
+
+ if (!flags) {
+ flags = talloc_strdup(ctx, "");
+ if (!flags) {
+ continue;
+ }
+ }
+
+ DEBUG(4, ("getlmhostsent: lmhost entry: %s %s %s\n",
+ ip, name, flags));
+
+ if (strchr_m(flags,'G') || strchr_m(flags,'S')) {
+ DEBUG(0,("getlmhostsent: group flag "
+ "in lmhosts ignored (obsolete)\n"));
+ continue;
+ }
+
+ if (!interpret_string_addr(pss, ip, AI_NUMERICHOST)) {
+ DEBUG(0,("getlmhostsent: invalid address "
+ "%s.\n", ip));
+ }
+
+ /* Extra feature. If the name ends in '#XX',
+ * where XX is a hex number, then only add that name type. */
+ if((ptr1 = strchr_m(name, '#')) != NULL) {
+ char *endptr;
+ ptr1++;
+
+ *name_type = (int)strtol(ptr1, &endptr, 16);
+ if(!*ptr1 || (endptr == ptr1)) {
+ DEBUG(0,("getlmhostsent: invalid name "
+ "%s containing '#'.\n", name));
+ continue;
+ }
+
+ *(--ptr1) = '\0'; /* Truncate at the '#' */
+ }
+
+ *pp_name = talloc_strdup(ctx, name);
+ if (!*pp_name) {
+ return false;
+ }
+ return true;
+ }
+
+ return false;
+}
+
+/********************************************************
+ Finish parsing the lmhosts file.
+*********************************************************/
+
+void endlmhosts(FILE *fp)
+{
+ fclose(fp);
+}
+
+/********************************************************
+ Resolve via "lmhosts" method.
+*********************************************************/
+
+NTSTATUS resolve_lmhosts_file_as_sockaddr(TALLOC_CTX *mem_ctx,
+ const char *lmhosts_file,
+ const char *name,
+ int name_type,
+ struct sockaddr_storage **return_iplist,
+ size_t *return_count)
+{
+ /*
+ * "lmhosts" means parse the local lmhosts file.
+ */
+
+ FILE *fp;
+ char *lmhost_name = NULL;
+ int name_type2;
+ struct sockaddr_storage return_ss;
+ NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
+ TALLOC_CTX *ctx = NULL;
+ size_t ret_count = 0;
+ struct sockaddr_storage *iplist = NULL;
+
+ DEBUG(3,("resolve_lmhosts: "
+ "Attempting lmhosts lookup for name %s<0x%x>\n",
+ name, name_type));
+
+ fp = startlmhosts(lmhosts_file);
+
+ if ( fp == NULL )
+ return NT_STATUS_NO_SUCH_FILE;
+
+ ctx = talloc_new(mem_ctx);
+ if (!ctx) {
+ endlmhosts(fp);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ while (getlmhostsent(ctx, fp, &lmhost_name, &name_type2, &return_ss)) {
+
+ if (!strequal(name, lmhost_name)) {
+ TALLOC_FREE(lmhost_name);
+ continue;
+ }
+
+ if ((name_type2 != -1) && (name_type != name_type2)) {
+ TALLOC_FREE(lmhost_name);
+ continue;
+ }
+
+ /* wrap check. */
+ if (ret_count + 1 < ret_count) {
+ TALLOC_FREE(ctx);
+ endlmhosts(fp);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ iplist = talloc_realloc(ctx, iplist,
+ struct sockaddr_storage,
+ ret_count+1);
+
+ if (iplist == NULL) {
+ TALLOC_FREE(ctx);
+ endlmhosts(fp);
+ DEBUG(3,("resolve_lmhosts: talloc_realloc fail !\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ iplist[ret_count] = return_ss;
+ ret_count += 1;
+
+ /* we found something */
+ status = NT_STATUS_OK;
+
+ /* Multiple names only for DC lookup */
+ if (name_type != 0x1c)
+ break;
+ }
+
+ *return_count = ret_count;
+ *return_iplist = talloc_move(mem_ctx, &iplist);
+ TALLOC_FREE(ctx);
+ endlmhosts(fp);
+ return status;
+}
+